Frequent consumption of red and processed meat has been shown in population studies to be positively correlated with cardiovascular disease [1-3], cancer and type 2 diabetes. Recent meta-analyses also indicate that it increases total mortality [4]. Hence, a high meat intake (regardless of its fat quantity and quality) is generally perceived to be unhealthy and something that should be avoided. However, although there are many studies documenting these associations, results are not always consistent and there are several methodological issues which weakens the strength of their findings (more on that in a bit). In the same way as the putative health risks of red meat consumption is investigated, its documented health benefits (which I will cover below) are equally as important and must be given a fair chance in the establishment of public health messages in relation to red meat consumption. In this article I will therefore cover both the risks and benefits associated with red meat consumption, and after having taken all the scientific data into consideration, argue that meat has been unfairly blamed…

This is a long article (7 pages excluding references) so here’s a printer-friendly download version for you who prefer to read away from the computer and/or want to share it with others.

The “bad” side of meat – supposed harm to health

Cardiovascular disease (heart attack, stroke and coronary heart disease)

In a study that found a significant positive association between servings of red meat and the risk of coronary heart disease (adjusted for age), this effect became non-significant (meaning it could have occurred by chance) after controlling for age, body weight, smoking, alcohol, physical activity, energy intake and family history of coronary heart disease in the multivariate analysis [1]. Another study reported found that red meat was associated with an increased risk of mortality from coronary heart disease, but their classification of red meat included processed meats [5]. Similar inconsistencies have been observed in [1, 6], because there is no universal agreement of which meats should be classed as processed or not [7, 8]. A recent meta-analysis from Harvard Medical School concluded that unprocessed red meat intake is not associated with coronary heart disease (relative risk per 100-g serving per day), while processed meat intake is associated with 42% higher risk of coronary heart disease (relative risk per 50-g serving per day) [9]. This study also found that consumption of unprocessed or processed meat were not associated with stroke [9].

Much evidence is based on studies that have investigated dietary patterns rather than meat consumption in relation to risk of cardiovascular disease [2, 10-13]. However, when looking at dietary pattern analyses and comparisons we have to remember that these types of studies make it impossible to isolate the effects of red meat alone, which is what the whole red meat – health diatribe is all about.

A typical Western dietary pattern has been identified that is high in red meat and meat products, low in fruit and vegetables and coupled with a sedentary lifestyle, smoking and high alcohol intake [14]. This type of diet has been associated with a 22% greater risk of mortality from cardiovascular disease than a prudent dietary pattern that is high in fruit and vegetables, legumes, poultry and whole grains [15]. Bearing in mind the very well documented health promoting effects of fruit and vegetables [16], this doesn’t come as a surprise.

Including red meat as part of the typical Western dietary pattern erroneously implies that red meat cannot be part of a healthy dietary pattern characterized by a high intake of for example fruit and vegetables, oily fish and legumes. This has been proven in several less frequently cited studies, which  demonstrated that when red meat is included is such a healthy dietary pattern, it is not related with cardiovascular disease mortality [17, 18].


Based on epidemiological studies it is assumed that meat, especially red meat, enhances risk for cancer, particularly of the colon, breast and prostate [19]. One of the 10 universal guidelines for healthy nutrition in a report of the World Cancer Research Fund released at the end of 2007 is to “limit intake of red meat and avoid processed meat”, as a result of the “convincing evidence” for an association with an increased risk of colorectal cancer development [20]. However, as it turns out, the allegedly “convincing evidence” is not at all that convincing [21]. For those unfamiliar with scientific parlance, saying that something has “convincing evidence” is a very bold statement. According to the scientific norms, that kind of statement requires that all different types of studies behind the evidence point in the same direction. This, coupled with the fact that the World Cancer Research Fund presented its “convincing evidence” in only one page of text f the 517-page report, has made several leading cancer researchers raise their eye-brows [21, 22].

The flaws with World Cancer Research Fund report are obvious when we look at statistics for meat intake and colon cancer incidence. According to this report, if we decrease our meat intake, then our risk of colorectal cancer will decrease too… In the UK during the period 1963 to 1998 the intake of red meat decreased by 25% [23]. Far from falling substantially, the incidence of colorectal cancer increased substantially! [23] Similarly, in Norway the intake of red meat has remained steady or has even decreased at a time when their risk of colorectal cancer increased by 50% [23]. The lack of linkage between meat intake and colorectal cancer risk can be illustrated further by comparing the countries in the European Union. Meat consumption in the UK is less than that in any of the other EU and  Mediterranean countries [24] and yet the colorectal cancer risk is much higher [23].  Spain has a very much higher intake of red meat but still the third lowest colorectal cancer risk [23].

One main flaw (there are several!) with the epidemiological studies that have investigated the relation between meat intake and cancer, is that they haven’t separated the effects of processed and unprocessed meat, and not taking consideration to cooking methods [25]. The most supported mechanism behind the putative carcinogenic effect of meat is the formation of mutagenic compounds, HCAs (heterocyclic aromatic amines) and PAHs (polycyclic aromatic hydrocarbons), when meat is cooked at high temperatures to a well-done state [26, 27]. However, very few studies have assessed the method of cooking when measuring meat consumption. Therefore, in the largest studies, the effects of red meat per se have not been isolated from the effects of processing or cooking temperatures. Of the few studies which have considered these factors, some found an increased risk of colon cancer with high intakes of well or very well done red meat compared to low intakes [28], whilst others found no increase in risk [29, 30]. The diverging findings can be explained by the fact that approximately 80% of colon cancer cases are thought to be caused by modifiable diet and lifestyle factors [31] and red meat (whether processed or not) is only one factor among a myriad of other strongly influential factors, including intake of fruit and vegetables, physical activity level, obesity and smoking.

A notable study is further supporting this [32]; here 265 000 Japanese persons were followed for 25 y. A detaileddiet history was taken at recruitment and regularly updated. Vegetable intake was stratified into four intake groups (daily, often, sometimes, and never) and then analyzed in relation to meat consumption and cancer risk in each group. As expected, the daily vegetable intake group had very much lower cancer rates than the never vegetable eating group, with the other two groups intermediate. Interestingly, in the group who ate green-yellow vegetables daily, there was an inverse relation between meat intake and colorectal cancer, meaning that a higher meat intake in the context a vegetable rich dietary pattern actually is associated with a lower colorectal cancer incidence! In the group who never ate vegetables there was, as expected, a positive relation between meat intake and cancer of the colon and rectum (the higher the meat intake, the higher the cancer incidence). Thus is seems as if meat is a risk factor, then it is only manifest among those who do not eat sufficient amounts of the protective factors. This is supported by a recent study demonstrating that a high consumption of fruit and vegetables is associated with a reduced risk of colon cancer [33].

Type-2 diabetes

Intake of red meat has also been associated with type-2 diabetes [34]. A meta-analysis that pooled the results from 12 population studies, found that when comparing high vs. low intake, the risk for type-2 diabetes was increased by 21% for unprocessed red meat and 41 % for processed red meat [34]. However, the absolute amount eaten varied greatly, and because the included studies didn’t properly control for influencing variables like body weight and physical activity, the researchers themselves admitted that it is possible that these confounding factors could have explained the observed association, and not necessarily the meat intake [34]. This is underscored by another study which found that the effect of unprocessed meat intake on type-2 diabetes is modified by body weight [35], which in turn is a function of physical activity and caloric intake.

In contrast, a more recent and more detailed meta-analysis, which pooled the results from 20 population studies, concluded that red meat intake is not associated with type-2 diabetes [9]. In agreement with the previous meta-analysis, an association between processed meat intake and type-2 diabetes was found, even though the increase in risk was lower, 19% per 50 g serving/day [9].

All-cause mortality

In March 2012, a media attention grabbing study was published that investigated the association between red meat intake and mortality. This large study prospectively followed 37 698 men from the Health Professionals Follow-up Study (1986-2008) and 83 644 women from the Nurses’ Health Study (1980-2008) who were free of cardiovascular disease (CVD) and cancer at baseline. Diet was assessed by validated food frequency questionnaires and updated every 4 years. The results showed that, after having adjusted for major lifestyle and dietary risk factors, adding 1 serving (3 oz) of unprocessed red meat or processed red meat  per day to one’s regular diet was associated with a 13% and 20% greater chance of dying from all causes, respectively.

It was also estimated that substitutions of 1 serving per day of other foods (including fish, poultry, nuts, legumes, low-fat dairy, and whole grains) for 1 serving per day of red meat were associated with a 7% to 19% lower mortality risk. It was further estimated that 9.3% of deaths in men and 7.6% in women in this study could have been prevented at the end of follow-up if all the individuals consumed fewer than 0.5 servings per day (approximately 42 g/d) of red meat. The conclusion of this study stated that red meat consumption is associated with an increased risk of total, CVD, and cancer mortality, and that substitution of other healthy protein sources for red meat is associated with a lower mortality risk [4].

My first question about this study was how it assessed lifestyle related risk factors. What jumped at me right off the bat when I was reading through the research publication was that the researchers, while using validated food frequency questionnaires, did not use validated lifestyle and physical activity assessment questionnaires. As I said in the meat – fat loss article, questionnaires are infamous for being inaccurate and bias prone. So if a questionnaire is used, it better be validated (which mean that what it is supposed to measure reasonably correlates to the results obtained with a more exact labor intensive measurement tool)! This fact, coupled with the finding that associations between diet and mortality are confounded by fitness [36], greatly weakens the conclusions drawn in this study.

To put the red meat – mortality data in context, and to illustrate the importance of fitness, I want to cite a study that investigated the association of cardiovascular fitness (measured by total duration during a maximal treadmill exercise test, and not a nonsense questionnaire!) and mortality [37]. Compared with the least fit men and women, the most fit men and women had 43% and 53% lower risk for all-cause mortality, and 47% and 70% lower risk of cardiovascular disease mortality, respectively [38]!!! Put this next to the meat – mortality data stating a 13-20% increase in mortality risk by eating red meat, and you get the point; red meat only plays a tiny, if any, role in the overall life style – mortality relation. It’s pretty obvious that the problem is not the red meat, but our lazy asses!!!

The importance of distinguishing between unprocessed and processed red meat

The most robust and reliable evidence to date of how unprocessed and processed red meat consumption may influence risk of cardio-metabolic diseases comes from the Harvard Medical School meta-analysis. The findings of different relationships of unprocessed versus processed red meat (bacon, hot dogs, salami etc.) consumption with coronary heart disease and type-2 diabetes (no effect of unprocessed red meat but increased risk with processed red meat, as outlined above) underscore the need to better characterize which particular components of meats that may increase cardio-metabolic risk [9]. The Harvard researchers also criticized the World Cancer Research Fund – American Institute for Cancer Research statement that both red and processed meat consumption increases colorectal cancer (see above), because they didn’t distinguish between processed and unprocessed red meat [9].

At least in the United States, where most of the studies have been performed, processed meats contain, on average, similar saturated fat and lower cholesterol and heme iron compared with red meats, suggesting that differences in these constituents may not account for different associations with disease risk [9]. This is a very important fact because both saturated fat, cholesterol and heme iron have been condemned for being the “meat evils”. From this data, we can draw the following conclusions:

1) Unprocessed red meat per see is NOT harmful.

2) Processed red meat can increase the risk for heart disease and type-2 diabetes, but this is not due to its content of saturated fat, cholesterol or heme iron.

Thus, it is other constituents in processed red meat that are contributing to the observed health risk association.

Processed meats contain preservatives and additives that can increase the risk of cardiovascular disease, type-2 diabetes or cancer. These may include nitrites, nitrates, and heterocyclic amines formed during cooking. Nitrosamines formed during cooking may be toxic to pancreatic cells [39]. In addition, advanced glycation end products formed in meat and high fat products through heating and processing have been associated with insulin resistance in mice, and with diabetes complications in humans [40].

In particular, nitrates and their byproducts (eg, peroxynitrite) promote atherosclerosis and vascular dysfunction, reduce insulin secretion, and impair glucose tolerance, and streptozotocin, a nitrosamine-related compound, is a known diabetogenic compound. In observational studies in children, nitrites and nitrous compounds are associated with type 1 diabetes mellitus [41, 42], and nitrite concentrations in adults have been used as a biomarker of endothelial dysfunction [43] and impaired insulin resistance [44]. However, the types of foods that are commonly replaced when individuals consume unprocessed versus processed meats could also account for their different associations with risk [9]. Ask yourself if you are more likely to eat veggies with a piece of steak, or with a hot dog, bacon and egg combo, or a salami meal…?

The meat and potato war…

I want to bring up another point showing that red meat has been unfairly attacked. While meat is blamed for generating risky heterocyclic amines during high temperature cooking (for example over open flames), nobody talk about the high levels of acrylamide that are formed during the frying, roasting, or baking of carbohydrate rich foods, especially potatoes and cereal products [45, 46]. And acrylamide possesses a range of hazardous effects and is known to induce carcinogenicity, genotoxicity, neurotoxicity and reproductive toxicity [45].

Let’s take a look at the average daily intakes for heterocyclic amines (from red meat) and acrylamide (from potatoes and cereals):

Average daily intakes for heterocyclic amines is in the range 2.5 – 26 ng/kg body weight/day [47-49].

Average daily intakes for acrylamide is in the range 370-490 ng/kg body weight/day [50, 51]

This clearly shows that acrylamide intakes are 20 to 150 times higher than that of heterocyclic amines! Makes me wonder if the potato and celery industry has some lobbying going behind the public health recommendations that urge us to lower our red meat intake…

Red meat and fat intake

Many people avoid red meat because of its total fat, saturated fat and cholesterol content. In an upcoming article I critically examine and explain the flaws in the diet-heart hypothesis (ie, the presumed link between saturated fat intake and cardiovascular disease) that has led to the long-standing public health recommendations for limiting saturated fat intake as a means to prevent cardiovascular disease. If you are more concerned about the purported fat intake – obesity relation, check out my other article on meat and fat loss. As illustrated by the popularity of low-carb, high-fat diets (also a topic for another article) your fat intake will not automatically make you fat. For those of you who still have dietary fat phobia, here are the hard facts.

The fat content and fatty acid profile in red meat is often misunderstood. The first thing to note is that most of the fat can easily be trimmed off before cooking. There is confusion among consumers about the impact of lean meat and meat fat on human health, because it is commonly, but incorrectly thought that lean meat tissue has the same saturated fat content as the visible fat of meat. Once visible fat is trimmed, lean red meat often contains less than 5-10% lipid [52]. And in high quality lean red meats, like the ones you can find at Eat To Grow, there is very little fat marbling within the meat. Lean meat is relatively higher in polyunsaturated fat and lower in saturated fat compared with the visible fat of meat [52]. The saturated fat content of lean red meat is less than 2-3g/100g (3.5 oz) lean red meat (for example in Eat To Grow‘s flank steak and beef tenderloin) compared with more than 37g/100g (3.5 oz)  of visible fat from red meat. Eat To Grow‘s meat cuts are also very low in cholesterol.

The main fat in lean meat tissue is in phospholipid form, which makes up the major portion of the cell membrane structure, and these are rich in polyunsaturated fats [53]. The other main fat in lean meat is the “regular” fat (more precisely known as triglyceride or triacylglycerol) which is predominantly saturated and monounsaturated fat [53]. The phospholipid fat in lean red meat is relatively constant and independent of the total fat content, whilst the content of “regular” fat increases as the total fat level increases [54]. Therefore, as the total fat content of lean red meat increases there is an increase in saturated and monounsaturated fat content. In other words, the fatty acid composition of meat depends on the total lipid content of the meat [53-56].

In lean beef, over half and up to 70% of fatty acids are monounsaturated or polyunsaturated, which are the types recommended by health professional and government agencies such as the American Heart Association and the Dietary Guidelines for Americans [57, 58]. Also, one-third of the saturated fat in red meat is stearic acid, which, unlike other long-chain saturated fatty acids, is neutral in its effects on blood cholesterol levels in humans [59, 60].

Lean beef contains around 10 g total fat (you can find even leaner cuts at Eat To Grow), no more than 4.5 g of saturated fat, and less than 95 mg cholesterol per 3-ounce serving [61]. This fat profile readily fits into a heart-healthy diet. Based on the American Heart Association’s dietary fat recommendations, the total, saturated fat and cholesterol intake goals are 30%, 10%, and 300 mg, respectively [57]. For an average person consuming a 2,000 calorie diet, the numbers will be 67 g total fat and 22 g saturated fat/day. As noted above, a 3-ounce serving of lean beef contains levels of total and saturated fat well below these limits, and cholesterol levels below the recommendation of <300 mg/day. You could fit in 3-4 lean meat servings per day and still be within those targets. And there is overwhelming evidence showing that lean red meat is as effective as chicken in blood cholesterol lowering diets, and therefore has a well deserved place in diets for cholesterol and lipid control  [52, 62-65].

The good side of meat – health promoting nutrients

The inordinate focus on red meat as the evil has distracted attention from its unique nutritional characteristics, which contribute to a healthy diet.

Meat is not only composed of fat and protein; it also contains essential nutrients which appear exclusively in meat (vitamin A, vitamin B12) and micronutrients for which meat is the major source because of either high concentrations or better bioavailability (folate, iron, selenium, zinc) [19, 66-69]. In particular, vitamin A, folate and selenium are reported to be cancer-preventive [19, 66].

Red meat being the major source of vitamin B12 is especially notable because vitamin B12, together with folate and vitamin B6 (also found in ample amounts in red meat), is required by the methylation cycle, which keeps the level of homocysteine under control. Homocysteine is not only a risk factor for cardiovascular disease [70-72], but also for cognitive decline and dementia [73-76] and vascular injury [77]. Thus, getting all these three vitamins in a highly bioavaliable form in one single food is a pretty good deal. An interesting effect of homocysteine is that it inhibits NO (nitric oxide) production in blood vessels and contributes to vascular dysfunction [78-80]. NO is an essential vasodilatory molecule and many supplements are marketed as being NO-boosters (I will save a discussion about those supps for another article). The take home here is that by eating red meat you will ensure to cover you vitamin requirements for preventing homocysteine levels to rise, and thereby avoid the homocysteine-induced NO synthesis inhibition.

Also, the iron in meat is in an especially highly bioavaliable form called heme iron, which is much more bioavailable than non-haem iron found in plant sources [67, 69, 81-83]. Red meat in particular is recognized as a significant source of hem iron compared to poultry and fish [84]. Iron is vital for many cellular processes in the body and, as a component of hemoglobin, is essential to maintaining adequate transport of oxygen in the blood. Therefore, even mild suboptimal status before the onset of anemia can negatively impact health [85]. Iron-deficiency anemia is a major nutritional deficiency, being particularly prevalent among children and young women [85]. Therefore, cutting out or lowering meat intakes could have a seriously negative impact on iron status and increase the risk for anemia.

Meat is a also a good source of vitamin D [69]. In particular, the vitamin D metabolite 25-hydroxycholecalciferol [25(OH)D3] is found in significant quantities in meat and liver and is assumed to have a high biological activity, resulting in better and faster absorption from the diet compared with its parent compound [86]. Furthermore, it has been suggested that components of meat protein may enhance the utilization of vitamin D in humans, particularly where exposure to sunshine is limited [87].

In addition, meat is a good source of choline, taurine, carnosine, coenzyme Q10, creatine and glutathione [88, 89]. Glutathione levels in red meat are estimated to be 12-26mg/100g in beef [90] and most meats contain approximately twice the level of glutathione of poultry and up to ten times the content found in fish [88].


Red meat, when part of healthy diet combined with regular exercise, does not pose any harm. Actually, in this context, red meat, thanks to it providing high quality protein together with valuable nutrients, is actually a very sound strategy for both health promotion, sports performance and muscle growth. The scientific reports on the detrimental health effects of red meat have to be interpreted with their methodological flaws in mind, and evaluated against the background diet. The meat-potato war clearly illustrates this. Also, there is compelling evidence showing that the supply of beneficial protective dietary factors, and people’s lifestyles, are probably more important that our red meat intake per see.

While high-heat food preparation causes formation of cancer-promoting substances, meat also contains cancer-protecting nutrients (vitamin A, folate and selenium). The latter can be optimized by a diet rich in fruit and vegetables, which contain a myriad of bioactive cancer-protective substances. Also, the amount of cooking dependent cancer-promoting substances can be reduced by avoiding open flame grilling and well done meats.

So the answer the question in the title “have we been blaming the wrong thing?” = YES!

Looking at all the scientific evidence, it is safe to say that the most appropriate conclusion to be drawn is that it is laziness, manifested as lack of regular physical activity, and lack of veggies that are the culprits behind the associations, and not the red meat!

Meat is a popular food especially among bodybuilders and strength athletes. Taking into consideration the intense training regimens these individuals partake in, if you are one of them, or if you train regularly just for health promotion, you have nothing to fear. To the contrary, thanks to the high quality protein red meat supplies, eating it together with your veggies is a smart strategy to build muscle, increase performance, and improve your health. For those who are concerned about preservatives or cattle chemicals, there are great high quality meat options. If you want to pump your muscles like the pros with high quality meat that hasn’t been pumped, get some from Eat To Grow!

About Monica Mollica - www.trainergize.com

Trainergize is a one-stop informational and motivational resource, presenting the latest health related research findings to health conscious people in an easy to understand way.

While still under development, trainergize.com is committed to providing credible, objective, and reliable health information on a wide range of topics that impact your health and wellness and that of your family. The information is derived from medical news and studies published in top tier medical journals or presented at professional medical meetings.

Trainergize was developed, and is run and maintained, by Monica Mollica. Monica has a Bachelor and Master degree in Nutrition from the University of Stockholm, Sweden, and is an ISSA Certified Personal Trainer. She works as dietary consultant and health journalist, and is also a fitness model and web designer. On trainergize.com Monica also offers diet/nutrition and exercise consultations.

As a young athlete, Monica realized the importance of nutrition for maximal performance at an early, and went for a major in Nutrition at the University of Stockholm.

During her years at the University she was a regular contributor to the Swedish fitness and bodybuilding magazine BODY, and she has written the book (in Swedish) “Functional Foods for Health and Energy Balance”, and authored several book chapters in Swedish publications.

After having earned her Bachelor and Master degree in Nutrition, she completed one semester at the PhD-program “Exercise, Nutrition and Preventive Health” at Baylor University Texas, department of Health Human Performance and Recreation.

Having lost her father in an heart attack at an age of 49, she is specializing in cardiovascular health, and primordial and primary prevention. She is a strong advocate of early intervention in adolescence and young adulthood, and the importance of lifestyle habits for health promotion at all ages.

Today, Monica is sharing her solid academic and real-life experience by offering nutrition/diet and exercise consultation services and working as a health journalist and medical reporter on topics related to fitness, health and anti-aging.

She is currently in the process of writing a book “Successful Aging – it’s your choice”, and developing the related website www.SuccessfulAging.me


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Monica Mollica holds a Master Degree in Nutrition from the University of Stockholm and Karolinska Institue, Sweden. She has also done PhD level course work at renowned Baylor University, TX.


Monica is a medical writer, body transformation coach, diet/supplement consultant, and a regular contributor to www.BrinkZone.com.


Check out Monica's website www.trainergize.com


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